One Guide, One Bit, One Setup makes both the mortise and matching tenon! Immensely strong, the mortise & tenon joint is well suited to fine furniture such as tables and chairs, and cabinetmaking. The FMT Pro is Leigh’s premium mortise & tenon jig, bringing professional quality mortise & tenon joinery to any shop and any woodworker. See how easily you can add perfect mortise & tenon joints to your woodworking project with the FMT Pro.

With the FMT Pro, you can rout 68 sizes of standard inch joints from 1/16" x 1/8" up to 1/2" x 5" (79 metric, from 2 x 4 mm up to 12 x 130 mm) using 21 standard guides (24 metric) and one or two Leigh bits. Custom joint sizes up to 1/2" x 5" (12 x 130 mm) can also be achieved.

Beauty and Strength

Mortise & tenon joints routed on the FMT Pro are immensely strong and virtually indestructible. This centuries-old joint is the thoroughbred of all woodworking joints and is used in fine furniture and cabinetmaking everywhere. You can easily make tables, chairs and stunning pieces like the bed below.

Create All This Joinery On One Jig

No other mortise & tenon jig offers the incredible range of joinery options possible with the FMT Pro. See the gallery for even more examples.

Single

For chairs, small tables, display
units, rail and stile (frame and
panel) construction

To fill the end of the stile
groove which is sometimes
run right through

Asymmetric Tenons

Tenon is uncentered on its shoulder for more strength at mortise board end

For framed, ledged and
braced windows and doors

Different Workpiece Thicknesses

For all kinds of furniture construction

Y-Axis Mortises

For routing mortises at 90°
to the clamp plate

Optional guide required

Square Tenons

Often used for replicating
period furniture

Optional guides required

Louver Doors

Louver doors and windows

Optional guides required

Dowel Joints

For joints requiring less
strength

For unusually shaped
workpieces of all types

Simple jig operation

The FMT Pro routs both the mortise and matching tenon, with just one joint guide, one router bit and one jig setup. The basic concept is simple, as shown below.

The universal sub-base with your mounted router is positioned on the jig table. It has two guide pins projecting from the bottom of the base. The right-hand pin always runs in the track to the right of the bit opening. The left-hand pin steers the router, traveling around the joint guide to rout the tenon, or in the joint guide center slot to rout the mortise.

How to Rout a Mortise & Tenon Joint

On the Leigh FMT Pro

The Tenon

1 Mark the center of the tenon on the tenon workpiece.

2 Clamp the workpiece against the clamp plate. Move the table to position the retractable sight over the layout lines. Lock the table.

3 Place the router/sub-base on the table with the right sub-base guide pin in the right guide track and the left pin, positioned to track around the guide. Rout the tenon.

Note: Duplicate tenons may now be routed without having to mark or sight the tenons.

The Mortise

1 Mark the left-to-right mortise position on a mortise workpiece.

2 The table remains in the same position. Clamp the mortise board to the jig with the mark aligned to the sight.

3 Place the router/sub-base on the jig table and plunge rout the mortise.

Joint Fit

Fit the mortise and tenon together to check for joint fit. Adjustments can be made if necessary.

Easy Step-By-Step Instructions and Superior Customer Service

The FMT Pro is designed for use by woodworkers of all levels. Leigh has made perfect joinery easy in every way, from thorough, step-by-step user guides, bulletins and how-to videos, to personalized customer service, with instant toll-free technical support and a help line. Click here for Support page.

New! How-To DVD Video Now Available

5 Year Warranty
Leigh has the best warranty in
the Industry, plus a 90-day
Satisfaction Guarantee.See details >